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Mulitmeter help

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by WogBoyz, Apr 10, 2009.

  1. WogBoyz

    WogBoyz 435rkw/590rwhp

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    just wonder ppl

    i bought a mulimeter exactly same as this one

    [​IMG]

    now im wanting to test my battery for the amout of volts or whatever it is at cold starts ive been told it shud be around 14 when engine off, and around 13 when running

    now i have no idea how to use this thing haha what do i set it on to test it?

    cheers people
     
  2. mulligan-can

    mulligan-can ?!?

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    Turn the dial to the 20 near where it is presently pointing to in that pic

    Put the red lead on the (+) terminal of the battery and the black lead on the (-) terminal.

    Should be 12-13 when stopped and 13+ when running I think.
     
  3. WogBoyz

    WogBoyz 435rkw/590rwhp

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    ahh kk so set it to the 20 in the v section
    cheers the help man
     
  4. hako

    hako Donating Member

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    A cold battery or one that has sat overnight should read a minimum of 12.6 volts engine stopped and when the engine has been running for a fair while and things are nice and warm it should read a maximum of 14.2 volts engine running. Have fun.
     
  5. WogBoyz

    WogBoyz 435rkw/590rwhp

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    kk what about when its hot but engine isnt running and cold but engine running?
     
  6. hako

    hako Donating Member

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  7. Cursed CX8

    Cursed CX8 Banned

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    just make sure the current doesnt blow the **** out of that little multi meter.
     
  8. Locky_MAC

    Locky_MAC New Member

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    You will have to change the RED plug that goes into the multimeter to the DC Voltage or you will get nothing?

    Are you testing something or just having a look?

    Voltages will stay around the same hot or cold, 12V something when engine off and 14V something when engine on if your alternator is working?

    If you want to truely test your battery, start your engine while reading the voltage it should stay steady at around 9V.

    Have fun.
     
  9. WogBoyz

    WogBoyz 435rkw/590rwhp

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    im just having a look, gunna do same to my dads and mums car too just to check it out
     
  10. WogBoyz

    WogBoyz 435rkw/590rwhp

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    how will i do that lol if i just set it too to the 20v and put the red on the + and the black on the - it shud be fine
     
  11. hako

    hako Donating Member

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    My advice is to leave it where it is in the picture except move the dial to 20v just as mulligan-can says.
    Also if you move the red lead to the next one up you will be bypassing the internal fuse - this means you can destroy your multimeter as that terminal is unfused....so I wouldn't risk that. That particular terminal is used when you want to measure current up to 10 amps and has a warning next to it saying it is unfused.
    Edit: please don't ever be tempted to check household 240VAC as you will probably kill yourself and ain't nodoby going to be happy then.
     
    Last edited: Apr 10, 2009
  12. Cursed CX8

    Cursed CX8 Banned

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    that multimeter is only rated to 10A-DC. A car battery is around 450amps
     
  13. 88GreenVN

    88GreenVN Next Exit Left

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    I think I'll leave my MM in it's box. Safer that way by the look of it.
     
  14. delcowizzid

    delcowizzid on holiday

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    measuring voltage is fine amps has noting to do with it at all .but if testing current when multimeter is connected inline not connected in parrallel like testing volts .it will only handle 10amps when inline and set on amps setting
     
  15. WogBoyz

    WogBoyz 435rkw/590rwhp

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    i did sparky for a year i know not to test my house haha so can i use this thing or not lol
     
  16. delcowizzid

    delcowizzid on holiday

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    yeah leave it all plugged in like it is in the pic set on 20v dc and hook it to the battery.
     
  17. WogBoyz

    WogBoyz 435rkw/590rwhp

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    kk thanks man

    so when engine off it shud read 12v's and when running should say 14v's approx

    and if i test it while it turns over should say about 9v's

    that all correct?
     
  18. mulligan-can

    mulligan-can ?!?

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    Why would you want to test it while it's turning over? Just curious? But no, it should, in theory if you have a decent battery, still read approx 12v.

    As said before, 12-13v powered off is a suitable reading for a 12v battery. At least 13v while charging, 14v is a more common min as it will allow faster charging.

    So long as the potential (voltage) across terminals when charging is greater than the potential across the terminals while in standby by about 2v your charging system is working fine. NB, standby must be >= 12v

    Warning:
    Do NOT move the "red" lead from the present location unless you plan on measuring currents. It is, as said above, unfused. It is also NOT connected to the rest of the multimeter, only the ammeter mode will work (on mine and any that I have used anyway).

    Anyway mate, everything you need to know about checking the basic condition of a battery has been answered here. If you want to get a better idea of the health of it then go out and grab a load box + impedance tester.

    Now, go out and make some sparks! (or play with the multimeter, whichever you prefer)

     
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  19. WogBoyz

    WogBoyz 435rkw/590rwhp

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    cheers for the help man by charging do u mean while the engine is running? sorry for the noob questions lol
     
  20. WogBoyz

    WogBoyz 435rkw/590rwhp

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    well i tested it today here are the results

    while engine off it read - 12.62

    while engine running - 14.4

    is that a healthy battery?
     

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